DRV8833 Evaluation Module. User's Guide

Transcription

1 DRV88 Evaluation Module User's Guide Literature Number: SLVU98 July 0

2 SLVU98 July 0 Copyright 0, Texas Instruments Incorporated

3 Contents Introduction... Schematic... PCB... 6 Connectors Motor Outputs Power and Control Signals... 7 Jumpers Voltage Regulator (JP6) nsleep (JP) xinx Signals (JP, JP, JP and JP) Switches (AIN, AIN, BIN and BIN) LED (D) Test Points Current Sense Resistors (R, R6)... 8 SLVU98 July 0 Copyright 0, Texas Instruments Incorporated Table of Contents

4 Introduction Introduction This document is provided with the DRV88 customer evaluation module (EVM) as a supplement to the DRV88 datasheet. It details the hardware implementation of the EVM. Contents SLVU98 July 0 Copyright 0, Texas Instruments Incorporated

5 VCP AOUT AOUT AISEN BOUT BOUT BISEN nfault nsleep VM VINT BIN BIN AIN AIN TP TP9 TP TP TP TP TP6 TP7 TP8 TP0 TP TP TP TP TP TP6 TP Schematic Schematic A A AIN AIN BIN BIN VINT nsleep nfault BISEN BOUT BOUT AISEN AOUT AOUT VCP VM R9 99 D nfault U AIN JP nsleep 6 AIN nsleep AIN J nsleep AOUT AIN AOUT AIN AOUT AISEN VINT C. uf AISEN VINT AOUT AOUT AOUT BOUT BOUT VM C 0. uf S NO BOUT VM BOUT BISEN VCP COMMON BISEN VCP BOUT 0 BIN NC BOUT BIN Header nfault BIN AIN nfault BIN JP B AIN B PWR_PAD 0 DRV88 AIN VM U may get hot C9.uF C 0uF C S NO COMMON NC AIN 00uF JP AIN BISEN AISEN BIN J AIN_ AIN_ C C S BIN_ BIN_ NO nfault COMMON R R6 NC BIN.. JP VM BIN Header8 JP6 VM REG BIN VIN VOUT C.uF S NO COMMON NC BIN BYPASS D D DRV88 Title Number evision R Size B Date: /9/0 6 heet S of File: :\Documents C andsettings\..\mimas_customerevm_a.schdoc DrawnBy: ON C.0uF Volt_RegLP98 JP BIN PCB C6 uf SLVU98 July 0 Copyright 0, Texas Instruments Incorporated Contents

6 PCB PCB 6 Contents SLVU98 July 0 Copyright 0, Texas Instruments Incorporated

7 Connectors Connectors. Motor Outputs The connector J should be connected to the motor terminals. Each pin in this terminal is labeled on the EVM itself as AOUT, AOUT, BOUT and BOUT. The polarity of these connections will affect the direction of the motor in the case of a brushed DC motor. In case of a stepper motor, one winding should be connected to AOUT and AOUT, while the other should be connected to the outputs BOUT and BOUT. Refer the datasheet for further information.. Power and Control Signals The power and control signals for the DRV88 are applied through the connector J. Each pin in the connector is labeled on the EVM. Check the schematic for further clarification. The control signals for AIN, AIN, BIN and BIN can also be generated on board. Refer the Jumpers section in this user guide. The connector J also outputs the nfault signal from the IC and the ( V) generated from the on-board voltage regulator. These signals are labeled on the EVM silkscreen. Apply a power of.7 V 0.8 V between VM and on J. Be sure to observe the correct polarity. Jumpers. Voltage Regulator (JP6) For the purpose of easy evaluation, a voltage regulator is provided on the DRV88EVM. This regulator regulates the VM voltage down to V if VM is greater than V and maintains VM if VM is less than V. If jumper JP6 is left shunted, the signal on the board is provided by this regulator. It is V and can drive up to 0 ma. This signal is used to light up the nfault LED, drive the nsleep signal and generates the HI signal for the switches AIN, AIN, BIN and BIN. If the sleep current of the DRV88 is being evaluated, leave this shunt off the board. This would make sure that the current measurement through VM doesn t include the current to the voltage regulator.. nsleep (JP) If this jumper is shunted, the V generated from the on-board voltage regulator is connected to the nsleep pin. This ensures the part doesn t enter the SLEEP mode. If the SLEEP mode is not being evaluated, then the Jumper can be left shunted. If the SLEEP mode is being controlled externally through any controller, then disconnect this jumper and connect the nsleep signal from the external controller directly to the test point nsleep.. xinx Signals (JP, JP, JP and JP) Jumpers JP, JP, JP and JP are used to select the source of the control signals AIN, AIN, BIN and BIN respectively. By placing a shunt between positions -, the source of these control signals are routed to the connector J. This connection allows the user to control these signals through an external controller. If the shunt is placed between positions -, then the source of these control signals are routed to the switches AIN, AIN, BIN and BIN. Refer to the section on the Switches for more information. 6 Switches (AIN, AIN, BIN and BIN) When the jumpers JP, JP, JP and JP are set such that the control signals AIN, AIN, BIN and BIN are routed to the switches, these switches can be used to control the state of these input signals. The positions are labeled appropriately as HI and LO. LO is and HI is ( V). The state of the motor outputs for various input combinations can be inferred from the datasheet. SLVU98 July 0 Copyright 0, Texas Instruments Incorporated Contents 7

8 LED (D) 7 LED (D) The diode D indicates the status of the nfault signal. When there is a FAULT condition on the DRV88, this LED lights up. The two possible fault conditions are over current and over temperature. Refer to the schematic / datasheet for more information. 8 Test Points Kelvin connections are provided for all pins of DRV88. They are appropriately labeled on the EVM. These test points can be used to measure the status of the pin or can be connected to the Sense of the controlling instrument. 9 Current Sense Resistors (R, R6) R and R6 are the current sense resistors directly connected to AISEN and BISEN respectively. The other side of this resistor is connected to. The value of this resistor is chosen to be 0. Ω. This value controls the current through the DRV88 to be. A. To change this value of regulating current, this resistor value must be changed as mentioned in the datasheet. 8 Contents SLVU98 July 0 Copyright 0, Texas Instruments Incorporated

9 Evaluation Board/Kit Important Notice Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards. As such, the goods being provided are not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmental measures typically found in end products that incorporate such semiconductor components or circuit boards. This evaluation board/kit does not fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling (WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives. Should this evaluation board/kit not meet the specifications indicated in the User s Guide, the board/kit may be returned within 0 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive. TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services described herein. Please read the User s Guide and, specifically, the Warnings and Restrictions notice in the User s Guide prior to handling the product. This notice contains important safety information about temperatures and voltages. For additional information on TI s environmental and/or safety programs, please contact the TI application engineer or visit No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or combination in which such TI products or services might be or are used. FCC Warning This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part of FCC rules, which are designed to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments may cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may be required to correct this interference. EVM Warnings and Restrictions It is important to operate this EVM within the input voltage range of 0 V to 0.8 V. Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions concerning the input range, please contact a TI field representative prior to connecting the input power. Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM. Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative. During normal operation, some circuit components may have case temperatures greater than 90 C. The EVM is designed to operate properly with certain components above 90 C as long as the input and output ranges are maintained. These components include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of devices can be identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during operation, please be aware that these devices may be very warm to the touch. Mailing Address: Texas Instruments, Post Office Box 60, Dallas, Texas 76 Copyright 0, Texas Instruments Incorporated

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